DVT during pregnancy

Hi!! I was doing the stair stepper at the gym today and a lady came up to me and told me I had a vein in my right calf that looked like it was acting up. I’m 38.5 weeks pregnant. What am I supposed to do with this information??! Obviously I googled it and dr google brought me to DVT and freaked me out, although I don’t feel pain or swelling. Is it possible to have your only symptom be a weird looking vein while you’re being active?